As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TROUBLE SHOOTING FOUND OUT THAT BUS BAR WAS CORRODED AND NOT MAKING PROPER CONTACTS WHEN GPU IS ATTACHED. BUS BAR WAS REPLACED ALONG WITH RECEPTACLE FOR FIX. SYSTEM CHECKED SERVICEABLE AND AIRCRAFT WAS RELEASED FOR SERVICE. (TC# 20181015014)